Liquid fuel burner with replaceable fuel nozzles



I E. s. COLLINSON 5 0 LIQUID FUEL BURNER WITH REPLACEABLE FUEL NOZZLES Oct. 20, 1953 Filed Nov. 9, 19'.

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2 Claims. (01; news) This invention relates to liquid fuel burner nozzles as used in conjunction with a combustion chamber, and has for its object to enable a stand-by or emergency nozzle to be provided in a simple and convenient manner.

The invention comprises the combination with a support adapted to be mounted in the combustion chamber and having therein a cylindrical bore provided with a lateral aperture through which the liquid fuel (in spray form) can be discharged into the combustion chamber, of a slidable tube extending through and in both directions from the support, means for sliding the tube relatively to the support, a pair of removable fuel injection nozzles situated adjacent to each other and to a lateral aperture or apertures in the tube, and means associated with the tubeactuating means for controlling the supply of liquid fuel to the nozzles, the arrangement being such that by axial movement of the tube relatively to the support, either nozzle can be moved into its service position.

In the accompanying drawing:

Figure 1 is a sectional side elevation illustrating an embodiment of the invention.

Figure 2 is a sectional side elevation to a larger scale than Figure 1 illustrating a convenient construction of one of the fuel nozzles.

Referring to the drawings, there is provided a burner support a mounted on one end of the combustion chamber b. In this support is formed a cylindrical bore disposed transversely to the combustion chamber, and in one side of the support is formed a liquid fuel discharge aperture 0. The support carries a slidable tube d which extends through and beyond both ends of the bore, and also through stufiing boxes e mounted on an air jacket 3 surrounding the combustion chamber.

In the drawings the combustion chamber 1) is shown in a vertical position, with the bore in the support a horizontal, but in practice the combustion chamber is usually arranged horizontally, in which case the bore in the support a is vertical.

In and at about the centre of the tube are mounted adjacent to each other a pair of liquid fuel injection nozzles, the axis of each of which is at right angles to the tube, and adjacent to the discharge end of each nozzle there is formed in the tube an aperture g through which the liquid fuel can be discharged. Each nozzle is contained in a cylindrical piston-like part it which closely fits the tube. To each nozzle is secured a feed pipe 1' extending from the nozzle to the outer end of the tube, the pipe and nozzle beinghe'ld in position by a cap 7 screwed or otherwise removably attached to the tube end. Fuel can be conveyed to the said pipes from a source of supply by flexible or other pipes attached to the outer ends of the pipes in the tube.

The two nozzles are similar to each other and are of any convenient construction such as that illustrated in section by Figure 2. Within the piston-like part 71. is contained a part is adapted to form with the part h an annular air space m through which air can flow from .the air jacket by way of an aperture n in the part a, and an aperture 0 in the tube d. Within the part It is formed a transverse bore p into which the fuel can flow from the pipe 1'. Within the bore 11 is contained an assembly of parts as shown forming a swirl chamber q to which the fuel has access through tangential passages r. From the swirl chamber the fuel is discharged in the form of a spray through an orifice s in the part 15. On emerging from the part t the fuel encounters a stream of air flowing transversely across the fuel stream from the air space m. The mixture of fuel and air emerges through an aperture 11. in the part it and thence passes through the apertures, g, c above mentioned to the combustion chamber.

At each outer end of the slidable tube d is formed or secured a toothed rack 2 with which engages a pinion 3, and on the spindle of each pinion is provided a cam 4 for actuating an associated spring-loaded valve 5 which controls the supply of fuel to the associated nozzle. One of the spindles (the left hand one in Figure 1) is operable by a hand lever 6 for imparting longitudinal movement to the tube d.

The arrangement is such that when either nozzle is in its operative position, the valve which controls the supply of fuel thereto is open and the other valve is closed. Also the other nozzle occupies an out-of-service position in which it is shielded by the support. In the event of failure of the operative nozzle, the other can be immediately moved into the service position by imparting an axial movement to the tube, this movement being accompanied by closing of the previously open valve and opening of the other valve. The defective nozzle can thereupon be withdrawn for repair or replacement.

By this invention a stand-by or emergency nozzle can be provided in a very convenient manner.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A liquid fuel burner comprising the com- 3 bination with a support adapted to be mounted on a combustion chamber and having therein a cylindrical bore provided with a lateral aperture through which the liquid fuel in spray form can be discharged into the combustion chamber, of a slidable tube extending through and in both directions from the support, means for sliding the tube relatively to the support, the tube having therein a pair of lateral apertures which can be brought by sliding movements of the tube into and out of a position opposite to the lateral aperture in the cylindrical bore of the support a pair of removable fuel injection nozzles situated ad-' jacent to each other and to the lateral apertures in the tube, and means associated with the tubesliding means for controlling the supply of liquid fuel to the nozzles, the arrangement being such that by axial movement of the tube relatively V to the support, either nozzle can be moved into a service position at the same time as the ad- 20 v 4 1 jacent lateral aperture in the tube is brought opposite to the lateral aperture in the support.

2. A liquid fuel burner as claimed in claim 1, in which the support and the tube are provided with additional lateral apertures which can be brought by sliding movements of the tube into and out of positions opposite to one another for permitting air flow to the nozzles.

ERIC SAMUEL COLLINSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,941,411 Mulholland Dec. 26, 1933 2,439,609 Mittendorf Apr. 13, 1948 2,458,372 Grimmeisen Jan. 4, 1949 7 I FOREIGN PATENTS Number Country Date 6,103 Great Britain June 3, 1915 

